−uv3 + uwv3−wv3 + v3−u2w2v2 + uw2v2 + 2uv2 + u2wv2−4uwv2 + 2wv2−2v2 + 2u2w2v−2uw2v−uv−2u2wv + 4uwv−wv + v−u2w2 + uw2 + u2w−uw